Berghof easyH2O Used Karl Fischer Coulometric Moisture Analyzer
| Brand | Berghof |
|---|---|
| Origin | Germany |
| Model | easyH2O |
| Measurement Principle | Pyrolysis-Coulometric Titration (P₂O₅-based) |
| Temperature Range | Ambient to 400 °C |
| Max Heating Rate | 40 °C/min |
| Detection Limit | 1 μg H₂O |
| Repeatability | ≤2% (at max rated current) |
| Sample Water Content Range | 0.01–15 wt% |
| Display Resolution | ppm to 99.99% |
| Sample Volume | 3 cm³ |
| Power Supply | 220 V, 50 Hz, 400 W, 4 A fuse |
| Protection Class | IP1 |
| Dimensions (W×H×D) | 500×180×500 mm |
| Weight | ~20 kg |
| Carrier Gas | Built-in air pump (ambient air) |
| Compliance | CE, EN 61326-1, EN 61326-2, EN 61010 |
| Interface | RS-232 for balance & PC |
| PC OS Requirement | Windows 7 |
| Accessories Included | Dell laptop, certified reference standards, ceramic coating kit, nickel boats, cleaning brush |
Overview
The Berghof easyH2O is a precision-engineered coulometric moisture analyzer designed for trace- and macro-level water quantification in solid, semi-solid, and powdered materials using pyrolysis-coulometric detection. Unlike classical gravimetric loss-on-drying (LOD) methods—which suffer from co-evaporation of volatiles and thermal decomposition artifacts—the easyH2O employs selective thermal release followed by quantitative electrochemical titration of evolved water vapor in a phosphorus pentoxide (P₂O₅) electrolytic cell. This principle ensures high specificity for H₂O, eliminating interference from solvents, plasticizers, or low-molecular-weight organics. The instrument thermally resolves water species based on binding energy: surface-adsorbed moisture (<100 °C), capillary-trapped water (100–200 °C), and strongly bound structural water (up to 400 °C), enabling method development for polymorph stability, hydrate characterization, and drying endpoint validation in pharmaceutical, polymer, and battery material R&D.
Key Features
- True coulometric detection with P₂O₅ electrolytic cell—no reagents, no consumables beyond nickel sample boats; cell regeneration via dry-air purge eliminates baseline drift and blank contribution.
- Zero warm-up time: operational immediately after power-on due to optimized thermal mass design and integrated temperature stabilization.
- Programmable heating profile: linear ramp (0.1–40 °C/min) and isothermal holds across 0–400 °C, supporting ASTM E1868-compliant moisture speciation protocols.
- Integrated carrier gas system: built-in diaphragm pump draws conditioned ambient air; optional high-purity N₂ or Ar supply enables inert-atmosphere analysis per ISO 8533 and USP <921> requirements.
- Robust electrical architecture compliant with EN 61010-1 (safety) and EN 61326-1/-2 (EMC for laboratory instrumentation), suitable for GLP/GMP-regulated environments.
Sample Compatibility & Compliance
The easyH2O accommodates samples up to 3 cm³ volume—including hygroscopic powders (e.g., LiCoO₂ cathode precursors), pharmaceutical excipients (microcrystalline cellulose, lactose monohydrate), catalyst supports (alumina, silica gels), and polymer granules (PA6, PET). Its non-destructive thermal desorption approach preserves sample integrity for post-analysis FTIR or XRD correlation. Method transfer and audit readiness are supported via full compliance with ISO/IEC 17025 documentation frameworks and compatibility with FDA 21 CFR Part 11–enabled data management systems when paired with validated third-party software. CE marking confirms conformity with EU Machinery and EMC directives.
Software & Data Management
Control and data acquisition are performed via RS-232 interface using the included Dell laptop preinstalled with Berghof’s native easySoft v3.x platform. The software provides real-time current integration, automatic peak deconvolution for multi-step water release, and export of raw coulombic charge curves (Q vs. T) in CSV format. All measurement parameters—including ramp rate, hold times, gas flow, and calibration constants—are digitally logged with timestamp and operator ID. Audit trails record method changes, calibration events, and system diagnostics—enabling full traceability required under GxP and ISO 17025 Clause 7.7.
Applications
- Pharmaceutical QC: Quantification of residual solvents and hydrate stoichiometry in active pharmaceutical ingredients (APIs) per ICH Q5C and USP <921>.
- Battery materials: Differentiation of physisorbed moisture vs. lattice-bound OH⁻ in NMC cathodes and solid-state electrolytes.
- Food science: Validation of freeze-drying endpoints and shelf-life modeling of hygroscopic intermediates.
- Polymers & composites: Monitoring hydrolytic degradation kinetics in polyesters and epoxy resins during accelerated aging.
- Reference material certification: Primary moisture assignment for CRM producers accredited to ISO 17034.
FAQ
Is this unit factory-refurbished or customer-used?
This is a demonstration unit originally deployed by Berghof for application support; it shows minimal operational hours and has undergone full functional verification prior to resale.
Does the P₂O₅ cell require periodic replacement?
No—the cell is regenerable via dry-air purge; lifetime exceeds 5,000 analyses under routine use with proper maintenance.
Can the system be integrated into an LIMS?
Yes, via ASCII-formatted CSV exports and configurable RS-232 command protocol; third-party middleware (e.g., LabWare, Thermo SampleManager) supports automated ingestion.
What calibration standards are included?
Certified 1.00 wt% and 10.0 wt% water-in-ketone standards (NIST-traceable), plus nickel boats and ceramic coating reagent for sample preparation.
Is on-site installation and IQ/OQ documentation available?
Yes—comprehensive commissioning, including Installation Qualification (IQ) and Operational Qualification (OQ) templates aligned with ISO/IEC 17025, is provided with the six-month onsite service agreement.
